Switching device.



O. RENNERT.

SWITGHING DEVICE. APPLICATION FILED JAN. 12, 1903.

936,666, 4 Tlatented Got. 12,1909.

Witnesses-- VQLlo OTTO RENNERT, 05 LONDON, ENGLANE.

SWITCHING DEVICE. V

Specification of Letters Fate-zit.

Patented tact. 3%, 1965?.

Application filed January 12, 1803. Serial Ho. 138,7fi9.

To all whom it may concern:

Be it known that I, ()T'ro RENNERT, a subject of the German Emperor, residing at. Seagrave Road, West Brompton, London, England, have invented certain new and useful Improvements in Switching Devices, of which the following is a specification.

The object of my invention is to provide an annunciator with means whereby the current is cut oil' from the annunciator coil and is switched onto another circuit in parallel with the annunciator coil. With this general object in view, my invention consists in the features, details of construction and combination of parts which will first be described in connection with the accompanying drawing and then particularly pointed out in the claims,

The drawing illustrates diagrammatically an apparatus embodying my invention.

In this drawing, a is a battery which is connected by conductors F) and c to a bell d, and by conductors b and c toa coil 6, this coil, therefore, being in multiple or parallel with the hell (2'. The coil e in the embodiment illustrated serves as the magnet coil of an annunciator.

In that branch of the circuit which contains the coil e, there is placed'a pair of contactsprings f, g,'said springs being normally held in contact with each other by means of a switch lever having two arms h and 0, the arm h carrying an indicator or semaphore device, as indicated at n and a proiiection which engages the contact spring 'lhe lever ll is normally held in a position to close the circuit at the contact springs f, by means of an armature lever k, pivoted at Z and provided with a detent tooth in which all) engages the top end of the switch lever h 0 as shown in the drawings.

In the circuit which contains the hell 0?, two contact springs f and g are provided, these being arranged in the path of the arm 0 of the switch lever. A suitable circuitclosing device, as for example, a push-button 2' is arranged in that part of the electric circuit common to both parallel branches of the circuit.

The operation of the embodiment of the invention hereinbefore described is as follows: When the push button is pressed, the

circuit is closed at that point and the current flows through the coil c of the annnnciator, no current passing through the hell. because the springs f and g are not in contact with each other. As soon as the coil 6 is energized, it attracts its armature lever k and thereby retracts the detenttooth in from the arm h of the switch lever which thereupon swings away from the contact springs f and g, thereby opening the circuit through the coil 6, the arm 0 of said switch lever, thencoming into engagement with the spring f and forcing 1tinto contact with the spring 9, thus closing the circuit through the hell a.

In this way, the entire strength of the hattery is thrown first into the coil c to operate one oi said common conductors, or a bell and v.

a pair of Contact springs in one of the parallel circuits, an annunciator magnet and a second pair of contact springs in the other parallel circuit, a switch lever arranged to close alternately the two pairs of contact s rings, and an armature lever enacting with t e annunciator magnet and arrahged to hold the switch lever in one positionjto, close the second pair of contact springs and, when the manually operated circuit closer is op: erated, to release said switch lever, whereby the latter then closes the first pair of contact springs.

2. The combination, with two circuits arranged in parallel and having conductors common to both circuits, :1 battery connected to said common conductors and a manually operated circuit closing device included in one of said common conductors, of two pairs of contact sprin s, one pair in each parallel circuit, a switci .lever arranged to close alternately the two pairsof contact springs, an armature arranged to hold the switch lever in a position to close the contact springs 9i circuit, can u] '11) testimony whereof I have signed my um; and 21 v Mme m spemficatlon m the nresence of two subsm' 1ng' witnesses.

OTTO RENNERT.

110.: lUV'fi. 3101 W ihi, m1 (no steam! parallel (in-cm? Eva's; opened, and :1 heil in me 2- Min] circuit. 

